99 lines
3.1 KiB
Python
99 lines
3.1 KiB
Python
# Copyright (c) 2015 Mirantis, Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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import os
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from oslo_config import cfg
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from oslo_log import log as logging
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from paste import deploy
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from murano.common.i18n import _
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CONF = cfg.CONF
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def _get_deployment_flavor():
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"""Retrieve the paste_deploy.flavor config item
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Retrieve the paste_deploy.flavor config item, formatted appropriately
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for appending to the application name.
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"""
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flavor = CONF.paste_deploy.flavor
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return '' if not flavor else ('-' + flavor)
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def _get_paste_config_path():
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paste_suffix = '-paste.ini'
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conf_suffix = '.conf'
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if CONF.config_file:
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# Assume paste config is in a paste.ini file corresponding
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# to the last config file
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path = CONF.config_file[-1].replace(conf_suffix, paste_suffix)
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else:
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path = CONF.prog + '-paste.ini'
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return CONF.find_file(os.path.basename(path))
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def _get_deployment_config_file():
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"""Retrieve the deployment_config_file config item
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Retrieve the deployment_config_file config item, formatted as an
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absolute pathname.
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"""
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path = CONF.paste_deploy.config_file
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if not path:
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path = _get_paste_config_path()
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if not path:
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msg = _("Unable to locate paste config file for %s.") % CONF.prog
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raise RuntimeError(msg)
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return os.path.abspath(path)
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def load_paste_app(app_name=None):
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"""Builds and returns a WSGI app from a paste config file.
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We assume the last config file specified in the supplied ConfigOpts
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object is the paste config file.
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:param app_name: name of the application to load
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:raises RuntimeError when config file cannot be located or application
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cannot be loaded from config file
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"""
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if app_name is None:
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app_name = CONF.prog
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# append the deployment flavor to the application name,
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# in order to identify the appropriate paste pipeline
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app_name += _get_deployment_flavor()
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conf_file = _get_deployment_config_file()
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try:
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logger = logging.getLogger(__name__)
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logger.debug("Loading {app_name} from {conf_file}".format(
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conf_file=conf_file, app_name=app_name))
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app = deploy.loadapp("config:%s" % conf_file, name=app_name)
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return app
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except (LookupError, ImportError) as e:
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msg = _("Unable to load %(app_name)s from configuration file"
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" %(conf_file)s. \nGot: %(e)r") % {'conf_file': conf_file,
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'app_name': app_name,
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'e': e}
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logger.error(msg)
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raise RuntimeError(msg)
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